Toyota 4Runner: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
No Door Lock/Unlock Functions Operate Via Master Switch or Driver Side Door Key Cylinder |
Proceed to "All Doors LOCK/UNLOCK Functions Operate Via Master Switch or Driver Side Door Key Cylinder" |
|
|
Only Driver Door Lock/Unlock Functions do not Operate |
Front door lock assembly LH |
|
|
Harness or connector |
- |
|
|
Main body ECU (Multiplex network body ECU) |
- |
|
|
Driver side junction block assembly |
- |
|
|
Only Passenger Door Lock/Unlock Functions do not Operate |
Front door lock assembly RH |
|
|
Harness or connector |
- |
|
|
Main body ECU (Multiplex network body ECU) |
- |
|
|
Driver side junction block assembly |
- |
|
|
Only Rear Door LH Lock/Unlock Functions do not Operate |
Rear door lock assembly LH |
|
|
Harness or connector |
- |
|
|
Main body ECU (Multiplex network body ECU) |
- |
|
|
Driver side junction block assembly |
- |
|
|
Only Rear Door RH Lock/Unlock Functions do not Operate |
Rear door lock assembly RH |
|
|
Harness or connector |
- |
|
|
Main body ECU (Multiplex network body ECU) |
- |
|
|
Driver side junction block assembly |
- |
|
|
Only Back Door cannot be Operated |
Proceed to "Only Back Door cannot be Operated" |
|
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Initialization
INITIALIZATION
1. PROCEDURES NECESSARY WHEN CABLE IS DISCONNECTED/RECONNECTED TO BATTERY TERMINAL
NOTICE:
After the battery is reconnected, be sure to wait 10 seconds or more
before att ...
Terminals Of Ecu
TERMINALS OF ECU
1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK
BODY ECU)
(a) Remove the main body ECU (multiplex network body ECU) (See page
).
(b) Measure ...
Other materials about Toyota 4Runner:
Door Courtesy Switch Circuit
DESCRIPTION
The side auto step controller ECU assembly receives the door open/closed signal
from each door courtesy light switch via the side auto step switch assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
Inspection should be performed on the ...
Transponder Chip Malfunction (B2793-B2795)
DESCRIPTION
DTC B2793 is stored when a malfunction is found in the key during key
code registration or a key code is not registered normally. Replace the
key if key code registration cannot be performed normally and this DTC is
output.
...
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